The UK aerospace industry sees a no-deal Brexit as the “worst case scenario,” according to the sector’s trade body.

The ADS (Aerospace, Defence, Security) chief executive Paul Everitt is the latest among industrial opinion leaders to call for regulatory alignment and a customs partnership with the EU.

Plane and parts must be certified by the European Aviation Safety Agency (EASA), that is, an agency that the UK must leave by March 2019. Without certification, manufacturers will be unable to sell in Europe but also globally, from the US to China.

ADS is calling for the UK’s Civil Aviation Authority (CAA) to begin immediate talks with EASA, even before political negotiations are concluded. At this point in time it remains unclear whether the UK aims to “re-shore” production or retain UK manufacturers in pan-European value chains.

Major manufacturing plants, including Airbus and Bombardier, are facing a major disruption in their supply chain if the UK is not aligned with the EU. Aviation is a €40bn industry in the UK and a disruption of access to the Single Market could cost the industry an estimated €2,5bn a year.